VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG COLL OF ENGINEERING
A brief discussion is presented of the use of polymers in general and polycarbonate in particular in experimental mechanics both from the viewpoint of materials for use in photomechanics and as materials for use in the validation of continuum constitutive equations. Experimental data is presented showing polycarbonate to be a ductile material with elastic, viscoelastic and plastic behavior regimes. Using constant heas rate tests 0.002 in.min. to 20 in. min., the rate-dependent-yield behavior of polycarbonate is presented and compared to behavior proposed for metals by Ludwik. Also, using creep tests, the time-dependent- yield behavior of polycarbonate is presented and compared to viscoelastic-plastic theories of Nagdi and Murch, and Crochet. Finally, possible applications of the results to photoplasticity and ductile fracture are discussed. Author-PL
Presented at the Battelle Colloquium on Deformation and Fracture of High Polymers, Kronberg(Germany), on 11-16 Sep 72.